DR. NICHOLAS OESER
NPI 1396098133
Psychologist in Petaluma, CA

Active since October 17, 2012PECOS Enrolled
1501 WEAVERLY DR, PETALUMA, CA 94954(650) 274-7272 Get Directions Write a Review

NPPES record last updated: August 30, 2022. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Aug 30, 2022, Jan 11, 2022, May 24, 2018 (3 updates tracked since 2018).

About Dr. Nicholas Oeser NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. NICHOLAS OESER (NPI 1396098133) is an individual psychologist in Petaluma, California, licensed in California (30082) and active in the NPI registry since October 2012. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1396098133
Entity TypeIndividualMale
Primary Taxonomy103T00000X
Provider Legal NameDR. NICHOLAS OESER
Location Address1501 WEAVERLY DRPetaluma, CA 94954-3727
Mailing Address2001 Junipero Serra BlvdDaly City, CA 94014-3891 · (650) 746-1621
Sole ProprietorNo
Enumeration DateOctober 17, 2012
Last NPPES UpdateAugust 30, 20223 updates tracked since enumeration
NPPES CertifiedAugust 30, 2022
✔ NPI 1396098133 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPsychologistBehavioral Health & Social Service Providers
Taxonomy Code103T00000X
License✔ Licensed in CA · 30082
Definition
A psychologist is an individual who is licensed to practice psychology which is defined as the observation, description, evaluation, interpretation, and modification of human behavior by the application of psychological principles, methods, and procedures, for the purpose of preventing or eliminating symptomatic, maladaptive, or undesired behavior and of enhancing interpersonal relationships, work and life adjustment, personal effectiveness, behavioral health, and mental health. The practice of psychology includes, but is not limited to, psychological testing and the evaluation or assessment of personal characteristics, such as intelligence, personality, abilities, interests, aptitudes, and neuropsychological functioning; counseling, psychoanalysis, psychotherapy, hypnosis, biofeedback, and behavior analysis and therapy; diagnosis and treatment of mental and emotional disorder or disability, alcoholism and substance abuse, disorders of habit or conduct, as well as of the psychological aspects of physical illness, accident, injury, or disability; and psycheducational evaluation, therapy, remediation, and consultation. Psychological services may be rendered to individuals, families, groups and the public.
1501 WEAVERLY DR, Petaluma, CA 94954

Other Names 1

Other Name (5)Nick Oeser

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Nicholas Oeser is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment– Home Health Agency– Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignment

Medicare enrollment records show Nicholas Oeser reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Internal Medicine
975 SERENO DRIVE
Vallejo, CA 94589
  • Reassigned Medicare billing, California enrollment
  • 20,078 clinicians in this Medicare group

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Nicholas Oeser's NPI number?

The NPI number for Nicholas Oeser is 1396098133. It was assigned to this individual provider in the NPPES registry on October 17, 2012. The provider is also known as Nick Oeser.

Where is Nicholas Oeser located?

Nicholas Oeser practices at 1501 Weaverly Dr, Petaluma, CA 94954. The listed phone number is (650) 274-7272.

What is Nicholas Oeser's specialty?

The primary specialty registered for this NPI is Psychologist with taxonomy code 103T00000X.

Is Nicholas Oeser enrolled in Medicare?

Yes. Nicholas Oeser is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Nicholas Oeser's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Nicholas Oeser reassigns Medicare benefits to Permanente Medical Group Inc (Vallejo, CA). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Nicholas Oeser's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Nicholas Oeser was last updated on August 30, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.